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Composite screw anchor foundation and construction method thereof

A construction method and the technology of screw anchors, which are applied in the direction of basic structure engineering and construction, can solve the problems of large demand for concrete, limited uplift bearing capacity, and large volume of pottery excavated foundations, so as to reduce the amount of earth excavation and improve The effect of increasing the pulling force and reducing the project cost

Pending Publication Date: 2018-03-27
SHAOXING DAMING ELECTRIC POWER DESIGN INST +2
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  • Application Information

AI Technical Summary

Problems solved by technology

Due to the spiral shape of the anchor piece, the uplifting bearing capacity is very limited; moreover, the excavated pottery foundation has a large volume, which requires a large amount of concrete and high cost, and a lot of waste soil will be generated during construction to damage the environment

Method used

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  • Composite screw anchor foundation and construction method thereof

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Embodiment Construction

[0017] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0018] A composite spiral anchor foundation 1 includes an anchor rod 2, the top or upper part of the anchor rod 2 is provided with a cylindrical foundation 1, and the lower part of the anchor rod 2 is coaxially pierced with a number of circular anchor pieces 3. The number of anchor pieces 3 is at least three, and the distances between adjacent anchor pieces 3 are equal. Both the anchor body and the anchor piece 3 are made of fiberglass composite material. The lower part of the anchor rod 2 is inserted into the hard soil layer or relatively hard soil layer, and the anchor body formed by concrete grouting on the upper part is the pile foundation 1 .

[0019] The construction of the above composite spiral anchor foundation 1 is as follows: firstly, ...

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Abstract

The invention provides a composite screw anchor foundation and a construction method thereof. The composite screw anchor foundation comprises an anchor rod; a cylindrical pile foundation is arranged on the top or the upper part of the anchor rod; and a plurality of circular anchor pieces are arranged on the lower part of the anchor rod coaxially in a penetrating mode. The anchor piece characteristic of a composite screw anchor is used, the composite screw anchor is fixed to a drilling machine to be screwed into a deep soil layer, then the anchor rod is grouted to form the pile foundation, partof uplift force is borne through undisturbed soil, uplift force borne on the pile foundation is reduced, the pulling resistance of the screw anchor and the pulling resistance, pressure resistance andhorizontal force resistance of the rigid foundation are fully utilized, the stress characteristic of the undisturbed soil is fully exerted, the foundation materials are saved, and the manufacturing cost of a project is reduced; and mechanical construction is adopted, so that the construction efficiency is effectively improved, and the construction method is suitable for being used at mire areas.

Description

technical field [0001] The invention relates to the field of transmission line engineering, in particular to a composite spiral anchor foundation and a construction method thereof. Background technique [0002] In the construction of transmission line projects, there are soft soil layers in the river terraces of some projects, and the conventional method for tower foundations is to use large slab foundations and large-diameter cast-in-place pile foundations. The large slab foundation has a large amount of excavation, a large amount of foundation steel and concrete, and a high foundation cost; due to the bearing capacity requirements of the cast-in-place pile foundation, the diameter and pile length are often large, and due to road conditions and terrain restrictions, some towers are generally large It is difficult for machinery to reach the position of the vertical tower, and small machinery cannot meet the pile diameter requirements. [0003] The application number is 2011...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D27/42E02D27/50
CPCE02D27/42E02D27/50
Inventor 朱江峰姚育陈斌沈勇吕建军冯炳李攀峰王振峰周吉安陈盛
Owner SHAOXING DAMING ELECTRIC POWER DESIGN INST
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